Patent GB-190803484-A (GB)
Title: Improvements in Internal Combustion Engines.
Inventor: KRAUSE PAUL
Filed: 1908-02-15
Granted: 1908-12-10
Abstract: 3484. Krause, P. Feb. 15. Elastic-fluid turbines. - In a gasengine in which the working chamber is separate from the compression and explosion chamber, the compressing- piston remains stationary during the explosion and then completes the stroke to scavenge the chamber. As applied to a gas turbine of the oppositelyrunning rotor type, a piston for compressing the combustible mixture is reciprocated in a revolving combustion chamber formed in an extension of the outer rotor, by a rod having a pin running in a cam-slot on a drum carried by the inner rotor. Steam from sprayed cooling-water also acts on the blades. Fig. 1 shows the arrrangement of the parts on the bed-plate 14 ; Figs. 2 and 3 are sectional views of the left and right hand ends respectively. A compression and explosion chamber 20 is attached to the outer rotor 11, a partition 21 separating it from the working chamber containing the blades 12, 13. The rotor 11 is supported in ball bearings on standards 15,16 and the inner rotor 10 on standards 17, 18, while the overhanging high pressrre end of the rotor 10 bears against a ball ring 25 carried by projections from the partition 21. The hollow piston-rod 28 of the piston 27 is fitted with a collar 28<a> which is gripped by an arm 30. A pin 32 on the end of a rod 31 connected with this arm runs in a cam-slot 33 on a drum 34 fixed to the inner rotor 10. The cam-slot is shaped to give to the piston 27 a complete suction stroke, a compression stroke to the position sbown in Fig. 2, a period of rest at the time of the explosion, and finally a movement up to the partition 21 to expel the products of combustion. Mixture from the carburettor is admitted through ports 39, 36 and the hollow rod 28. Means are provided for bring- ing an abutment 40 up against the end of the piston rod at the time of the explosion to prevent the piston from being forced back. The upright 40 slides in the bed-plate and is controlled by togglelevers 43, 44 and a bell-crank lever 45. The bell-crank is actuated through a link 47 by a spring 50 on a bolt 48. At the end of the short scavenging stroke following the explosion, a shoulder 48<a> carried by the reciprocating arm 30 compresses the spring 50 until a catch 51 engages a collar 49 on the bolt 48. During the suction stroke, the bolt is forced towards the left, causing the upright 40, to the end 41 of which the link 44 is secured, to recede in front of the piston-rod. At the end of the suction stroke, a projection 53 on the catch 51 rides up a fixed part 52 and releases the collar 49, allowing the spring 50 to bring the abutment 40 back into contact with the piston-rod. A ball ring 42 is provided. The abutment 40 also serves to close the spring-held inlet valve 29. At the beginning of the suction stroke, the outer end of a lever 56, pivoted on and passing into the piston-rod, is forced against a fixed part 57 so that the inner end opens the inlet valve 29. A spring-pulled catch 58 slides down behind the lever, and keeps the valve open until the end of the suction stroke, when the catch is withdrawn by means of an inclined surface 61. The ignition circuit is completed by the contact of a spark-plug 88 in the rotating chamber 20 with a fixed arm 89. External fan blades 26 set up a circulation of air for cooling purposes. The ports 22 in the partition 21 are controlled by a valve 23 which is normally held closed by a spring 64 acting on a collar 62 on the valve-rod 24. A loose collar 65 with ball bearings is placed between the spring and the collar 62. The other end of the spring abuts against the end of a sleeve 63 held by a yoke 66. The tension of this spring is reduced sufficiently to let the gases open the valve by moving the sleeve 63 longitudinally outwards. To effect this, the yoke 66 is carried by a bell-crank lever 67, a roller 68 on the other end being arranged to run on a cam 69 on the drum 34. The valve-rod 24 is hollow to allow cooling-water to be sprayed through a nozzle 73 upon the partition 21. The steam generated passes through the turbine. A reciprocating pump worked by an eccentric on an extension of the valve-rod 24 may supply the water, and it is stated that the turbine may thus be fed with combustion products and steam alternately. The exhaust, led off through a pipe 75, may be passed through an air-cooled condenser, and the water may be used over again. Gear teeth 81, 87 are provided on the outer and inner rotors respectively, and are connected by three suitable gear-wheels arranged on two intermediate shafts. Power may be taken from either of the intermediate shafts.